package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * TODO
 *
 * @Author Yjr
 * @Date 2025/5/22 19:43
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    /**
     * 微信登录
     *
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO);

        //判断openid是否为空
        if (openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断用户是否是新用户
        User user = this.lambdaQuery().eq(User::getOpenid, openid).one();

        //如果是新用户,进行注册
        if (user==null){
             user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
             this.save(user);
        }
        return user;
    }

    private String getOpenid(UserLoginDTO userLoginDTO) {
        Map<String,String> map =new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }


}
